Backstory; I used LaBella 760 Flatwounds on my P Bass for years until hand surgery.

Then a very brief time I tried continuing with a short scale Gibson EB-0  Bass then a Guild Bass before having to stop playing Bass altogether.

These strings here were put on but  with VERY little playing time on them, and are for sale here so hopefully someone can use them. 
Not much of a profit  motive here as you can see from the opening bid. They are great strings.

Fitting strings to a Guild or Gibson Bass Guitar can be tricky, so there are some different sizes here. 

GHS lists Bass string sizes in their own particular way.

LaBella 760FL Deep Talking' Bass Stainless Steel Flatwound MEDIUM Scale length 4 strings 

GHS Precision Flats MEDIUM Scale - Light 45-95
 
GHS Precision Flats  LONG Scale Plus, 38 inch winding - Light 45-95

GHS Precision Flats  Custom MEDIUM, 38 inch Winding 45-105